Snap-hook



Patented Mar. 7, 1899.

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(Application led Jam. 6, 1898.)

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UNITED STATES PATENT OFFICE.

JAMES C. COVERT, OF WATERVLIE'I, NEW YORK.

SNAP-HOOK.

SPECIFICATION forming part of Letters Patent No. 620,569, dated March '7, 1899.

Application filed January 6, 1898. Serial No. 665,810, (No model.)

To @ZZ whom, t ntcty concern:

Be it known that I, JAMES C. COVERT, a citizen of the United States, residing at Watervliet, in the county of Albany and State of New York, have invented certain new and useful Improvements in Snap-Hooks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to lnake and use the same.

This invention relates to an improvement in snap-hooks, and it is embodied in the construction hereinafter described, and defined in the claims.

The invention relates more particularly to what are commonly known as bolt-snaps, wherein a spring-pressed bolt is employed, the bolt working in a barrel or cylinder, its outer end resting normally against lthe nose of the hook.

In bolt-snaps there are what is known as the core type, wherein the barrel or cylinder is cast with a core, and that type which I shall term the turned-over type, wherev in the blank is cast in substantially trough shape, the upper portions of the sides being afterward turned over, thereby forming the completed cylindrical barrel. My invention pertains to this latter type of snap. In this class of snap hooks it has been recognized as a necessity to have an opening in the rear of the barrel for the escape of dirt or other foreign material, which if allowed to remain would soon prevent the bolt from having the requisite backward movement into the barrel to wholly remove the locking end of the bolt from the entrance passage-'way of the hook proper.

Heretofore various snap structures of the turned-over form, .as distinguished from the cored form, have been formed with dischargeopenings or dirt-escape holes at their rear ends. The openings have been made and located, however, in such a manner and in such position that the spiral spring will occasionally work out of the hole and also in such a position that the spring will have an uneven or partial back abutment, the spring tending to partially close the hole or opening, preventing the escape of the dirt. An instance of such a structure is that wherein the rear end corners of the wings of the cylinder are cut off, leaving a V or curved opening at the top of the rear portion. Also long slots have been left between the wings for the free eX- posure of the interior of the barrel. Also the upper edge of the end-closing lug or ear has been cut outat one side, forming a back opening at the top. The defects incident to such structures have been wholly overcome by the presentinvention,which may therefore be said to consist generally in a turned-over snap having at its rear an abutment which forms an even complete rest for the end of the spring and a central opening for the escape of dirt or foreign matter so located that the end of the spring will not under the usual and ordinary conditions escape or obstruct the opening.

In the accoxnpanyin g drawings I have shown a form of hook embodying this invention for the purpose of illustration only, and I wish it to be understood that the invention is not limited to the construction shown.

In the drawings, Figure l is a perspective view of the hook. Fig. 2 is a plan view of a blank. Fig. 3 isa rear end view of a blank. Fig. 4 is alongitudinal section of a hook. Fig. 5 is a cross-section on the line :t fc, Fig. 4; and Fig. 6 is a rear view of a modified form.

In the drawings, A designates the body or barrel portion ,which is cast conveniently with its sides or wings d open or trough-shaped.

B designates the hook portion, C the sliding bolt, and D the coiled spring.

In forming the barrel the sides a are in a well-known manner bent in toward each other, forming what I term a turned-over barrel, which consequently has a longitudinal split and in the chamber of which the bolt and spring are located.

On the inner faces of the extreme rear end portions of the wings a are formed inwardlyextending anges E. VThese flanges extend but partially across the interior of the barrel` or space between the wings and are united at their lower edges with the continuous crossflange F, lying along and integral with the base or lower walls of the body Within, how ever, the contines of the wings. The flanges E are cast perpendicular, as shown in Figs. 4 and 5, and taper from their lower ends upward, the inclination, however, being more pronounced on their outer faces, as shown in Fig. 5, whereby the tops of the fianges are ar- In forming the barrel the wings and fianges are both bent on a curve inward toward each other, as above intimated. The flanges being tapered will bend along the proper points to form the proper arcs, and when so bent the 'rear of the barrel will lbe formed with a circular abutment consisting of flanges E F and through the een ter will be a substantially cirl cular hole. I have found by experiment that when the rear edges of the Wings and the rear faces of the fianges are straight or .perpendicular by bending the parts the upper ends will bend out or backward, leaving an over hanging portion, which is ordinarily objectionable.

I believe I am the first to ever successfully produce a turned-over snap with flanges within the confines of the sides for the purposes indicated, and to thereby form a turned-over snap in every respect equal and superior to the cored snap.

I have shown a modified form in Fig. G, wherein the iianges H are shortened and the wings project above the same, the latter being turned over in completing the barrel.

Having thus described the invention, what is claimed as new, and desired to be secu red by Letters Patent, is-

l. A bolt sn ap-hook` comprising a hook portion, a-barrel portion having one side split or separated longitudinally, a sliding bolt, a spring in the rear of the bolt within the barrel, and an abutment within the rear portion of the barrel having an opening therein of a diameter less than the diameter of the chamber within the barrel and against which the rear end of the spring rests, substantiallyas described.

2. A bolt snap-hook comprising a hook portion, a barrel portion having one side split or separated longitudinally, a sliding bolt, a spring in the rear of the bolt within the barrel, and an abutment having an inclined face, located Within the rear of the barrel and having an opening therein of a diameter less than that of Ithe chamber in the barrel, substantially as described.

3. A bolt-snap-hook blank having a substantially trough-shaped body or barrel portion, a hook portion at the forward end of the body portion and aninwardly-extending abutment-fiange Within the rear portion ofthe body.

4. A bolt-snap-hook blank having a substantially trough-shaped body or barrel portion, a hook at the forward edge of the same and an inwardly-extending abutment-flange within the rear portion of the body, havingoppositely-inclined upper edges, substantially as described.

In testimony whereof I aiiix my signature in presence of two witnesses.

JAMES C. COVERT.

Witnesses:

L. S. BACON, L. PJWHITAKER. 

